Cisco ASR 903

Step 4
Measure the DC voltage on the failed power supply input, thus ensuring that the correct unit has been powered off.
Step 5
Loosen the captive screws on the DC power supply.
Step 6
Grasping the power supply handle with one hand, pull the power supply out from the chassis while supporting it with
the other hand.
Step 7
Remove the lugs from the PSU.
Step 8
Replace the new DC PSU and connect the DC leads to the power supply as before
Step 9
Turn on the circuit breaker or the reinstall the fuse.
Step 10
Verify the power supply by checking if the front panel LEDs are as below:
•
Input OK LED is green
•
Output FAIL LED is green
Replace the DC power supply within 5 minutes. If the power supply bay is to remain empty, install a blank filler
plate (Cisco part number A900-PWR-BLANK) over the opening, and secure it with the captive installation
screws.
Note
Installing the AC power Supply
This product requires short-circuit (over current) protection, to be provided as part of the building
installation. Install only in accordance with national and local wiring regulations.
Warning
Cisco ASR 903 and ASR 903U Aggregation Services Router Hardware Installation Guide
38
Installing the Cisco ASR 903 Router
Installing the AC power Supply